I got the caps glued on this evening and got some 6" to slide inside the caps for spacers. I'll start fiberglass work tomorrow after I verify fitment over my skylon. I should have probably used the wider cross like you did to put the speakers further apart, but that was the last one the store had.

I have no need for the speakers/racks etc. on my ride, but daaamnn you guys build some nice stuff!
Creative and well executed. I just like reading the threads just to see what new stuff you all have come up with.
As always, keep the pics coming too.
Nice job all, you know who you are.